monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[176.022315] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2 (usb)
ACTION=add
BUSNUM=004
DEVNAME=/dev/bus/usb/004/003
DEVNUM=003
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2
DEVTYPE=usb_device
MAJOR=189
MINOR=386
PRODUCT=1cbe/fd/100
SEQNUM=2456
SUBSYSTEM=usb
TYPE=239/2/1

KERNEL[176.023510] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0
DEVTYPE=usb_interface
INTERFACE=2/2/1
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01ic02isc02ip01in00
PRODUCT=1cbe/fd/100
SEQNUM=2457
SUBSYSTEM=usb
TYPE=239/2/1

KERNEL[176.026303] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/tty/ttyACM0 (tty)
ACTION=add
DEVNAME=/dev/ttyACM0
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/tty/ttyACM0
MAJOR=166
MINOR=0
SEQNUM=2458
SUBSYSTEM=tty

KERNEL[176.026644] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.1 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.1
DEVTYPE=usb_interface
DRIVER=cdc_acm
INTERFACE=10/0/0
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01ic0Aisc00ip00in01
PRODUCT=1cbe/fd/100
SEQNUM=2459
SUBSYSTEM=usb
TYPE=239/2/1

KERNEL[176.027077] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.2 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.2
DEVTYPE=usb_interface
INTERFACE=255/0/0
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01icFFisc00ip00in02
PRODUCT=1cbe/fd/100
SEQNUM=2460
SUBSYSTEM=usb
TYPE=239/2/1

KERNEL[176.027444] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.3 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.3
DEVTYPE=usb_interface
INTERFACE=254/1/1
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01icFEisc01ip01in03
PRODUCT=1cbe/fd/100
SEQNUM=2461
SUBSYSTEM=usb
TYPE=239/2/1

UDEV  [176.034435] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2 (usb)
ACTION=add
BUSNUM=004
DEVNAME=/dev/bus/usb/004/003
DEVNUM=003
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2
DEVTYPE=usb_device
DRIVER=usb
ID_BUS=usb
ID_MM_DEVICE_IGNORE=1
ID_MODEL=In-Circuit_Debug_Interface
ID_MODEL_ENC=In-Circuit\x20Debug\x20Interface
ID_MODEL_FROM_DATABASE=In-Circuit Debug Interface
ID_MODEL_ID=00fd
ID_REVISION=0100
ID_SERIAL=Texas_Instruments_In-Circuit_Debug_Interface_0E208121
ID_SERIAL_SHORT=0E208121
ID_USB_INTERFACES=:020201:0a0000:ff0000:fe0101:
ID_VENDOR=Texas_Instruments
ID_VENDOR_ENC=Texas\x20Instruments
ID_VENDOR_FROM_DATABASE=Luminary Micro Inc.
ID_VENDOR_ID=1cbe
MAJOR=189
MINOR=386
PRODUCT=1cbe/fd/100
SEQNUM=2456
SUBSYSTEM=usb
TYPE=239/2/1
USEC_INITIALIZED=176033739

UDEV  [176.051914] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0
DEVTYPE=usb_interface
DRIVER=cdc_acm
ID_MODEL_FROM_DATABASE=In-Circuit Debug Interface
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Luminary Micro Inc.
INTERFACE=2/2/1
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01ic02isc02ip01in00
PRODUCT=1cbe/fd/100
SEQNUM=2457
SUBSYSTEM=usb
TYPE=239/2/1
USEC_INITIALIZED=176043482

UDEV  [176.053569] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.1 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.1
DEVTYPE=usb_interface
DRIVER=cdc_acm
ID_MODEL_FROM_DATABASE=In-Circuit Debug Interface
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Luminary Micro Inc.
INTERFACE=10/0/0
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01ic0Aisc00ip00in01
PRODUCT=1cbe/fd/100
SEQNUM=2459
SUBSYSTEM=usb
TYPE=239/2/1
USEC_INITIALIZED=176045669

UDEV  [176.053745] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.2 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.2
DEVTYPE=usb_interface
ID_MODEL_FROM_DATABASE=In-Circuit Debug Interface
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Luminary Micro Inc.
INTERFACE=255/0/0
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01icFFisc00ip00in02
PRODUCT=1cbe/fd/100
SEQNUM=2460
SUBSYSTEM=usb
TYPE=239/2/1
USEC_INITIALIZED=176047657

UDEV  [176.053906] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.3 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.3
DEVTYPE=usb_interface
ID_MODEL_FROM_DATABASE=In-Circuit Debug Interface
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR_FROM_DATABASE=Luminary Micro Inc.
INTERFACE=254/1/1
MODALIAS=usb:v1CBEp00FDd0100dcEFdsc02dp01icFEisc01ip01in03
PRODUCT=1cbe/fd/100
SEQNUM=2461
SUBSYSTEM=usb
TYPE=239/2/1
USEC_INITIALIZED=176049292

UDEV  [176.059616] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/tty/ttyACM0 (tty)
ACTION=add
DEVLINKS=/dev/serial/by-id/pci-Texas_Instruments_In-Circuit_Debug_Interface_0E208121-if00 /dev/serial/by-path/pci-0000:00:1a.1-usb-0:2:1.0
DEVNAME=/dev/ttyACM0
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/tty/ttyACM0
ID_BUS=pci
ID_MM_CANDIDATE=1
ID_MODEL=In-Circuit_Debug_Interface
ID_MODEL_ENC=In-Circuit\x20Debug\x20Interface
ID_MODEL_FROM_DATABASE=In-Circuit Debug Interface
ID_MODEL_ID=0x2938
ID_PATH=pci-0000:00:1a.1-usb-0:2:1.0
ID_PATH_TAG=pci-0000_00_1a_1-usb-0_2_1_0
ID_PCI_CLASS_FROM_DATABASE=Serial bus controller
ID_PCI_INTERFACE_FROM_DATABASE=UHCI
ID_PCI_SUBCLASS_FROM_DATABASE=USB controller
ID_REVISION=0100
ID_SERIAL=Texas_Instruments_In-Circuit_Debug_Interface_0E208121
ID_SERIAL_SHORT=0E208121
ID_TYPE=generic
ID_USB_CLASS_FROM_DATABASE=Miscellaneous Device
ID_USB_DRIVER=cdc_acm
ID_USB_INTERFACES=:020201:0a0000:ff0000:fe0101:
ID_USB_INTERFACE_NUM=00
ID_USB_PROTOCOL_FROM_DATABASE=Interface Association
ID_VENDOR=Texas_Instruments
ID_VENDOR_ENC=Texas\x20Instruments
ID_VENDOR_FROM_DATABASE=Luminary Micro Inc.
ID_VENDOR_ID=0x8086
MAJOR=166
MINOR=0
SEQNUM=2458
SUBSYSTEM=tty
TAGS=:systemd:
USEC_INITIALIZED=176055574